#scatterometer
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eumetsat-users.bsky.social
An updated version of the EPS-SG SCAtterometer (SCA) L1b test data (version 3) has been released to users bit.ly/47Oy6jT
November 13, 2025 at 3:38 PM
gum.nws-bot.us
Special Weather Statement issued November 4 at 6:00PM ChST by NWS Tiyan GU
Additional Details Here.
An unsettled weather pattern extends across eastern Yap State. A circulation, known as Invest 90W, is centered near 10N143E near Gaferut, and embedded within the monsoon trough that extends across western Micronesia. Invest 90W continues to consolidate and is expected to become a tropical depression later this evening. Scatterometer data this morning showed winds of around 25 to 30 kts along the northeast to eastern flanks of the circulation center, mainly associated with heavy showers and thunderstorms near 90W's center. Heavy convection will continue to build over the eastern islands of Yap State as Invest 90W consolidates. Model guidance indicates 90W will slowly move northwest over the next few days, likely passing between Yap and the Marianas. This will drag the monsoon trough north and west, pulling the heavy showers further west across Yap State and towards Yap Proper and surrounding islands. Strong to gale-force west to southwest monsoonal winds and gusts and heavy showers and thunderstorms will make inter-island travel hazardous and potentially dangerous at times through the week. Surf will be elevated due to the background westerly swell from the monsoon pattern and swell being generated from Invest 90W. Elevated surf, along with elevated King Tides around the full moon on Wednesday, may lead to minor splashup/runup on beaches, mainly along south and west facing shores. Residents and mariners should monitor the latest forecasts for the region at weather.gov/gum/PublicForecasts and any information shared by WSO Yap for their local regions. A circulation, known as Invest 90W, is centered near 10N143E near Gaferut in Yap State, and embedded within the monsoon trough that extends across western Micronesia. Invest 90W continues to consolidate and is expected to become a tropical depression later this evening. Scatterometer data this morning showed winds of around 25 to 30 kts along the northeast to eastern flanks of the circulation center, mainly associated with heavy showers and thunderstorms near 90W's center. Western Chuuk State is currently on the eastern edge of the monsoon trough and gusty winds associated with heavy showers and thunderstorms developing around 90W. As 90W continues to move west- northwest and away from Chuuk State over the next couple of days, conditions will gradually improve across western Chuuk State. Seas and surf may remain choppy and elevated, especially along south and west facing reefs, due to the westerly swell generated by the monsoon pattern and as 90W slowly develops. Tides will be elevated for a few days due to the King Tides associated with the full moon on Wednesday, and along with elevated surf, may lead to minor splashup/runup on beaches, mainly south and west facing shores. Residents and mariners should monitor the latest forecasts for the region at weather.gov/gum/PublicForecasts and any information shared by WSO Chuuk for their local regions.
November 4, 2025 at 8:15 AM
gum.nws-bot.us
Special Weather Statement issued November 4 at 5:36AM ChST by NWS Tiyan GU
Additional Details Here.
An unsettled weather pattern extends across eastern Yap State and into western Chuuk State. A circulation, known as Invest 90W, is centered near 9N145E near Faraulep and Gaferut, and embedded within the monsoon trough that extends across western Micronesia. The Joint Typhoon Warning Center (JTWC) has upgraded Invest 90W to High with a Tropical Cyclone Formation Alert (TCFA), meaning a significant tropical cyclone (Tropical Depression) is expected to develop within the next 24 hours. Scatterometer data overnight showed winds of around 25 to 30 kts along the northeast to eastern flanks of the circulation center, mainly associated with heavy showers and thunderstorms near 90W's center. Heavy convection will continue to build over the eastern islands of Yap State and into western Chuuk State as Invest 90W consolidates. Model guidance indicates 90W will slowly move northwest over the next few days, likely passing just south of the Marianas. This will drag the monsoon trough north and west, pulling the heavy showers away from Chuuk State and further west across Yap State. Strong west to southwest monsoonal winds and heavy showers and thunderstorms will make inter- island travel hazardous and potentially dangerous at times. Residents and mariners should monitor the latest forecasts for the region at weather.gov/gum/PublicForecasts and any information shared by WSO Yap and WSO Chuuk for their local regions.
November 3, 2025 at 7:45 PM
gum.nws-bot.us
Special Weather Statement issued November 3 at 3:03PM ChST by NWS Tiyan GU
Additional Details Here.
An unsettled weather pattern extends across eastern Yap State and into western Chuuk state. A circulation, known as Invest 90W is centered near 9N147E near west Fayu and Pikelot, and embedded within the monsoon trough that extends across western Micronesia. The influence of 90W is helping to generate a westerly wind burst with winds around 25 to 30 kts according to scatterometer data, with stronger gusts likely in heavy showers and thunderstorms. Model guidance shows that Invest 90W will likely consolidate slowly, with little likelihood of developing into a significant tropical cylone over the next 24 hours, though heavy convection will continue to build over the eastern islands of Yap State and into western Chuuk State. Invest 90W is expected to slowly move northwest, dragging the monsoon trough north and west, pulling the strong monsoon winds and heavy showers away from Chuuk State and further west across Yap State. Strong southwest monsoonal winds and heavy showers and thunderstorms will make inter-island hazardous and potentially dangerous at times. Residents and mariners should monitor the latest forecasts for the region at weather.gov/gum/PublicForecasts and any information shared by WSO Yap and WSO Chuuk for their local regions.
November 3, 2025 at 5:15 AM
osi-saf.eumetsat.int
The scatterometer data we use to retrieve wind allow measuring the wind speed and direction over open ocean. Due to land contamination of the data, we however remove the biased information in coastal areas. That is why our measurement miss here the centre of the hurricane.
October 29, 2025 at 3:14 PM
lukastestaccountje.bsky.social
Vanochtend vroeg werden de tropische orkanen Humberto en Imelda gelijktijdig vastgelegd door de Chinese HY2-C wind scatterometer. Het KNMI leverde de windsnelheden en-richtingen van de wind boven zee die bij beide orkanen horen.
Humberto en Imelda samen gespot
Vanochtend vroeg werden de tropische orkanen Humberto en Imelda gelijktijdig vastgelegd door de Chinese HY2-C wind scatterometer. Het KNMI leverde de windsnelheden en-richtingen van de wind boven zee
www.knmi.nl
October 1, 2025 at 10:30 AM
knmi.nl
Vanochtend vroeg werden de tropische orkanen Humberto en Imelda gelijktijdig vastgelegd door de Chinese HY2-C wind scatterometer. Het KNMI leverde de windsnelheden en-richtingen van de wind boven zee die bij beide orkanen horen.
Humberto en Imelda samen gespot
Vanochtend vroeg werden de tropische orkanen Humberto en Imelda gelijktijdig vastgelegd door de Chinese HY2-C wind scatterometer. Het KNMI leverde de windsnelheden en-richtingen van de wind boven zee
www.knmi.nl
October 1, 2025 at 10:30 AM
rogue-nhc-pacific.bsky.social
NWS National Hurricane Center Miami FL
1100 AM PDT Mon Sep 29 2025

For the eastern and central North Pacific east of 180 longitude:

tropical weather outlook over the next 2 days greyscale satellite image of Eastern Pacific Ocean for NWS National Hurricane Center Miami FL 1100 AM PDT Mon Sep 29 2025 For the eastern and central North Pacific east of 180 longitude: 1. Well South of the Baja California Peninsula (EP98): A small area of low pressure has developed within a broader area of disturbed weather located several hundred miles offshore of the southwest coast of Mexico. First light visible satellite imagery and recent scatterometer imagery suggests a well-defined circulation is developing. In addition, convection continues to show signs of organization. If these trends continue, a tropical depression is likely to form as soon as this afternoon. The system is forecast to drift westward over the next day or so, then turn west-northwestward or northwestward thereafter, remaining over the open waters of the central to western part of the Eastern Pacific. * Formation chance through 48 hours...high...90 percent. * Formation chance through 7 days...high...90 percent. 2. South of of the Baja California Peninsula: Shower and thunderstorm activity has not become any better organized in association with a small area of low pressure located a few hundred miles west-southwest of Manzanillo, Mexico. Additional development of this system appears unlikely over the next day or two before it is absorbed by a larger area of disturbed weather (EP98) to its southwest. * Formation chance through 48 hours...low...10 percent. * Formation chance through 7 days...low...10 percent. 3. Near the Southwest Coast of Mexico: Another area of low pressure is expected to develop off the southwest coast of Mexico near the end of the week. Environmental conditions are forecast to be conducive for additional development of the system thereafter and a tropical depression could form by the early portion of next week as the system moves generally west-northwestward, near the coast of Mexico. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 7 days...medium...50 percent. Forecaster Papin tropical weather outlook over the next 7 days color illustrated image of Eastern Pacific Ocean for NWS National Hurricane Center Miami FL 1100 AM PDT Mon Sep 29 2025 For the eastern and central North Pacific east of 180 longitude: 1. Well South of the Baja California Peninsula (EP98): A small area of low pressure has developed within a broader area of disturbed weather located several hundred miles offshore of the southwest coast of Mexico. First light visible satellite imagery and recent scatterometer imagery suggests a well-defined circulation is developing. In addition, convection continues to show signs of organization. If these trends continue, a tropical depression is likely to form as soon as this afternoon. The system is forecast to drift westward over the next day or so, then turn west-northwestward or northwestward thereafter, remaining over the open waters of the central to western part of the Eastern Pacific. * Formation chance through 48 hours...high...90 percent. * Formation chance through 7 days...high...90 percent. 2. South of of the Baja California Peninsula: Shower and thunderstorm activity has not become any better organized in association with a small area of low pressure located a few hundred miles west-southwest of Manzanillo, Mexico. Additional development of this system appears unlikely over the next day or two before it is absorbed by a larger area of disturbed weather (EP98) to its southwest. * Formation chance through 48 hours...low...10 percent. * Formation chance through 7 days...low...10 percent. 3. Near the Southwest Coast of Mexico: Another area of low pressure is expected to develop off the southwest coast of Mexico near the end of the week. Environmental conditions are forecast to be conducive for additional development of the system thereafter and a tropical depression could form by the early portion of next week as the system moves generally west-northwestward, near the coast of Mexico. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 7 days...medium...50 percent. Forecaster Papin
September 29, 2025 at 10:54 PM
nhc-epac.nws-bot.us
NHC Eastern North Pacific Outlook update for Mon, 29 Sep 2025 17:49:44 UTC
Additional Details Here.
ZCZC MIATWOEP ALL<br>TTAA00 KNHC DDHHMM<br><br>Tropical Weather Outlook<br>NWS National Hurricane Center Miami FL<br>1100 AM PDT Mon Sep 29 2025<br><br>For the eastern and central North Pacific east of 180 longitude:<br><br>1. Well South of the Baja California Peninsula (EP98):<br>A small area of low pressure has developed within a broader area of <br>disturbed weather located several hundred miles offshore of the <br>southwest coast of Mexico. First light visible satellite imagery and <br>recent scatterometer imagery suggests a well-defined circulation is <br>developing. In addition, convection continues to show signs of <br>organization. If these trends continue, a tropical depression is <br>likely to form as soon as this afternoon. The system is forecast to <br>drift westward over the next day or so, then turn west-northwestward <br>or northwestward thereafter, remaining over the open waters of the <br>central to western part of the Eastern Pacific. <br>* Formation chance through 48 hours...high...90 percent. <br>* Formation chance through 7 days...high...90 percent.<br><br>2. South of of the Baja California Peninsula:<br>Shower and thunderstorm activity has not become any better organized <br>in association with a small area of low pressure located a few <br>hundred miles west-southwest of Manzanillo, Mexico. Additional <br>development of this system appears unlikely over the next day or two <br>before it is absorbed by a larger area of disturbed weather (EP98) <br>to its southwest. <br>* Formation chance through 48 hours...low...10 percent. <br>* Formation chance through 7 days...low...10 percent.<br><br>3. Near the Southwest Coast of Mexico:<br>Another area of low pressure is expected to develop off the <br>southwest coast of Mexico near the end of the week. Environmental <br>conditions are forecast to be conducive for additional development <br>of the system thereafter and a tropical depression could form by the <br>early portion of next week as the system moves generally <br>west-northwestward, near the coast of Mexico. <br>* Formation chance through 48 hours...low...near 0 percent. <br>* Formation chance through 7 days...medium...50 percent.<br><br><br><br>Forecaster Papin<br><br><br> Eastern North Pacific 2-Day Graphical Outlook Image Eastern North Pacific 7-Day Graphical Outlook Image
September 29, 2025 at 6:00 PM
jonnyday.bsky.social
Scatterometer is used in ERA5. See table 4: rmets.onlinelibrary.wiley.com/doi/abs/10.1...

Contrast with ERA5-land, which assimilated no data.
The ERA5 global reanalysis
This paper presents a comprehensive overview of the ERA5 global reanalysis from 1979 onwards, which is produced at ECMWF as part of the Copernicus Climate Change Service. It provides a detailed...
rmets.onlinelibrary.wiley.com
September 24, 2025 at 2:38 PM
gum.nws-bot.us
Special Weather Statement issued September 21 at 5:42PM ChST by NWS Tiyan GU
Additional Details Here.
A broad tropical disturbance, being monitored as Invest 92W, is slowly moving through western Micronesia and towards Palau and Yap and is located near 9N141E. Today's satellite scatterometer data and visible satellite imagery does not show a well-defined circulation, but an elongated area of cyclonic (counter-clockwise) turning, that is generating locally heavy showers, potentially with some gusty winds. The Joint Typhoon Warning Center rates 92W as a "sub-low" for development, which means significant development into a tropical cyclone is unlikely over the next 24 hours. Mult-model consensus does support a gradual development of 92W later this week, but the overall trend supports development as 92W is west of Palau and Yap, and is moving west-northwest into the Philippine Sea. This slow and disorganized development will lead to widespread variability in conditions across Palau and Yap State, however, the potential for locally heavy showers, gusty winds, and choppy seas exists across the region. Model ensembles show the potential for 3 to 6 inches across the region through Friday, but the location of the heavier rainfall will depend on where the locally heavy showers setup. At this time, landslides are unlikely, due to the high variability in rainfall potential. However, if soils become saturated by heavy rain, this potential will increase with the onset of additional rainfall. Also, northwest to north swells generated by distant Typhoons Ragasa and Neoguri will be increasing surf along west and north facing reefs of Palau and Yap over the next few days, leading to elevated surf along west and north facing reefs. Current wave model projections keep surf below hazardous levels of 9 feet, but this forecast will be closely monitored for any changes. As 92W moves west of Palau and Yap, there is the potential for a monsoon- like pattern to develop as 92W organizes, prolonging elevated seas and surf along the western sides of the islands and impacting areas sensitive to southwest to westerly winds and swells. Residents and mariners should monitor the latest forecasts for the region at weather.gov/gum/PublicForecasts and any information shared by WSO Palau and WSO Yap for their local regions.
September 21, 2025 at 7:45 AM
sausiuswx.bsky.social
Of course the opposite side is currently obscured by deep convection but advanced scatterometer data from this afternoon shows us that stronger winds are in the north(west) and this is consistent with modelling and typical storm evolution in these parts.
September 10, 2025 at 10:05 PM
osi-saf.eumetsat.int
If you missed our webinar on #Ocean Surface #Scatterometer #Winds products 🌬️🛰️, or want to see it again, you can now access a recorded version on our youtube!

youtu.be/-tTiskP0seU

@copernicusmarine.bsky.social @knmi.nl @hayleyeversking.bsky.social @gwenbras.bsky.social
Webinar: Ocean Surface Scatterometer Winds from OSI SAF and Copenicus Marine Service (02/09/2025)
YouTube video by OSI SAF
youtu.be
September 5, 2025 at 1:12 PM
osi-saf.eumetsat.int
Last day to register to our #scatterometer #wind webinar!
osi-saf.eumetsat.int EUMETSAT OSI SAF @osi-saf.eumetsat.int · Aug 26
Next week, on Tuesday 02/09/2025, our #ocean #wind #scatterometer retrieval team at @knmi.nl will explain all you need to know about these products 🌬️🛰️ from the catalogue of @osi-saf.eumetsat.int
and @copernicusmarine.bsky.social .
Don't forget to register on: eumetsat.zoom.us/webinar/regi...
September 1, 2025 at 11:51 AM
osi-saf.eumetsat.int
Next week, on Tuesday 02/09/2025, our #ocean #wind #scatterometer retrieval team at @knmi.nl will explain all you need to know about these products 🌬️🛰️ from the catalogue of @osi-saf.eumetsat.int
and @copernicusmarine.bsky.social .
Don't forget to register on: eumetsat.zoom.us/webinar/regi...
August 26, 2025 at 8:35 AM
osi-saf.eumetsat.int
On Tuesday 02/09/2025, our #ocean #wind #scatterometer retrieval team at @knmi.nl will explain all you need to know about these satellite products 🌬️🛰️ from the catalogue of @osi-saf.eumetsat.int and @copernicusmarine.bsky.social.
Register now to this free seminar: eumetsat.zoom.us/webinar/regi...
Ocean Surface Scatterometer Winds webinar. Two sessions available on 02/09/2025 at 08:00UTC or 13:00UTC
August 14, 2025 at 7:26 AM
pppapin.bsky.social
Congrats to the ESA for launching the 1st part of the Second Generation MetOp mission!

I for one am very excited about Metop-SG B1 follow on that is planning launch in January 2026 since it includes another C-band scatterometer.

space.oscar.wmo.int/instruments/...
August 13, 2025 at 2:44 PM
osi-saf.eumetsat.int
Are you using #scatterometer retrieval of #ocean #wind from @osi-saf.eumetsat.int or @copernicusmarine.bsky.social, or planning to?
On Tuesday 02/09/2025, our @knmi.nl specialists will answer all your questions about these satellite products 🌬️🛰️
register on: eumetsat.zoom.us/webinar/regi...
Ocean Surface Scatterometer Winds webinar. Two session available on 02/09/2025 at 08:00UTC or 13:00UTC
July 17, 2025 at 9:56 AM
fabriceardhuin.bsky.social
Our proposal for Earth Explorer 11 was "STREAM" using a Doppler scatterometer and estimated to be too expensive. I then helped a little with SEASTAR (using a better measuring technique with ATI SAR, but a much narrower swath).. and now there is a little hope that WIVERN can deliver some currents.
July 9, 2025 at 8:19 AM
franceslarina.bsky.social
The Advanced Scatterometer (ASCAT) Data Products manati.star.nesdis.noaa.gov/datasets/ASC...

This is the amazing tool that predicts and tracks hurricanes and other storms. The Trump administration has decided that in a month, this data will only be available to the military.
The Advanced Scatterometer (ASCAT) Data Products
manati.star.nesdis.noaa.gov
July 2, 2025 at 4:35 AM
dkwhattopoly.bsky.social
An
earlier scatterometer pass around 1629 UTC showed a peak wind of 47
kt, and helped to refine the current tropical-storm-force wind
radii. Latest objective and subjective satellite intensity estimates
range from 45 to 55 kt, including a T/3.5 from TAFB.
June 30, 2025 at 9:35 PM
dkwhattopoly.bsky.social
This wind field matches the satellite-derived scatterometer wind
data at 1619 UTC which showed a closed circulation, but with peak
winds of only 24 kt.
June 28, 2025 at 11:12 PM
michaelrlowry.bsky.social
Shallow convection and weak circulation but fishy enough. Quick assist from the subtropics while the tropical Atlantic sleeps? I've seen worse. NHC says 20% for now. Narrow window and no threat to land regardless.
Visible satellite loop from around 1:15 PM ET to 3:35 PM ET Sunday of the disturbance designated Invest 90L by the National Hurricane Center. The small disturbance is located about 450 miles east of Bermuda over the open central Atlantic but shows a closed albeit weak circulation with improving organization. Satellite derived wind vectors from the European Space Agency's Advanced Scatterometer (ASCAT C) taken around 1:17 PM ET Sunday showing a weak but closed circulation with the disturbance designated Invest 90L over the central Atlantic. Graphical Tropical Weather Outlook from the National Hurricane Center valid 2 PM ET Sunday, June 22, 2025, showing a yellow hatched oval over the open central Atlantic 450 miles east-southeast of Bermuda indicating a 20% chance of development (low odds) associated with the disturbance designated Invest 90L.
June 22, 2025 at 8:02 PM
tenuretracker.bsky.social
Universitat Hamburg is hiring:
Research Associate for the DFG Project “MultiSCOSS” concerned with scatterometer sea-ice studies
May 30, 2025 at 5:06 AM
caraearth.bsky.social
#Radartechnologie gilt als aktives Fernerkundungssystem, da sie aktiv einen #Mikrowellenimpuls sendet und die reflektierte Energie erfasst. Dopplerradar, Scatterometer und Radarhöhenmesser sind Beispiele für aktive Fernerkundungsinstrumente, die Mikrowellenfrequenzen nutzen...
Microwaves - NASA Science
You may be familiar with microwave images as they are used on TV weather news and you can even use microwaves to cook your food. Microwave ovens work by using
science-nasa-gov.translate.goog
May 18, 2025 at 4:07 PM